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The leaching of celestite in sodium sulfide solution to produce strontium carbonate
Published in Gülhan Özbayoğlu, Çetin Hoşten, M. Ümit Atalay, Cahit Hiçyılmaz, A. İhsan Arol, Mineral Processing on the Verge of the 21st Century, 2017
M. Erdemoğlu, M. Sarikaya, M. Canbazoğlu
The manufacture of strontium carbonate the most widely produced strontium chemical, from celestite by direct conversion method has been still the subject of some investigations, however, the black ash method is applied economically by most of the strontium carbonate producers. In the black ash method, strontium sulfide (SrS) is formed by roasting a celestite concentrate with powdered coke in a rotary kiln at 1100°-1300°C (Erdemoglu et al. 1998). The decomposible sulfide is then leached with water, filtered, and reacted with carbon dioxide to precipitate strontium carbonate (Erdemoglu & Canbazoglu 1998). Since the black ash process has the disadvantage of being energy intensive and in the black ash method the presence of iron and silicon compounds cause problems due to the formation of water-insoluble ferrites and silicates during roasting (Castillejos et. al. 1996), an alternative route direct conversion method is now being considered.
Diaqua oxalato strontium(II) complex as a precursor for facile fabrication of Ag-NPs@SrCO3, characterization, optical properties, morphological studies and adsorption efficiency
Published in Journal of Coordination Chemistry, 2019
A. M. Nassar, A. M. Elseman, Ibrahim Hotan Alsohaimi, N. F. Alotaibi, A. Khan
Strontianite or strontium carbonate (SrCO3) has been used in large-scale applications such as a chemical sensors, glasses and ceramics, bioactive materials, catalysts, composites for enhancing catalytic properties, TV screen fabrications and in industrial production [1–7]. S. Jin et al. considered SrCO3 as economic and environmentally friendly material (eco-friendly material) in the improvement of the photocatalytic activity of SrTiO3 during NO removal [8]. Some studies have discussed the adsorption properties of SrCO3 due to its various architectures [9, 10]. There are several methods for preparation of strontium carbonate with different morphologies which affect the material shape [11]. Recently, W. Zhang et al. reported the controllable synthesis of micro-nanostructures of strontium carbonate with different morphological structures through hydrothermal preparation [12]. Thermal decomposition of strontium oxalate also resulted in the formation of strontium carbonate [13]. At room temperature, SrCO3 has orthorhombic structure and converts to hexagonal shape when heated at 912 °C [14].
Perturbation analysis of the Heterogeneous Quasi 1-D model – a theoretical framework for predicting frequency response of AP–HTPB composite solid propellants
Published in Combustion Theory and Modelling, 2020
In practice, high energy (>80% AP) and low index (n<0.3) compositions are sought. Note that adding aluminum is not an option for low-smoke applications. But the minimum index achievable with only AP and HTPB is 0.4 ([15]). Therefore, in practice n<0.3 can only be achieved with special burn rate suppressing additives. Common additives include strontium carbonate, oxamide and titanium di-oxide.